I'm Mr. Stradivarius, active on the English Wikipedia. I've been converting templates to Lua since the summer of 2013, and I have filed a few bugs in the Scribunto extension, and have even submitted a patch or two.

My profile picture is the Lady Blunt Stradivarius, named after its first known owner, Lady Anne Blunt. Lady Blunt was the daughter of Ada Lovelace, which means that the instrument is probably the geekiest Strad before the turn of the 19th century. ;) The picture is taken from Wikimedia Commons.